John Deere 316 318 420 Lawn and Garden Tractor Technical Manual TM1590 – Repair & Diagnostics PDF

Description

John Deere 316, 318 & 420 Lawn and Garden Tractor Technical Manual — TM1590

The John Deere 316, 318 and 420 Lawn and Garden Tractor Technical Manual, document TM1590, is the complete service and diagnostic guide for these three tractor models. This edition is a full revision consolidating the repair and diagnostic content previously found in TM1277 and TM1345. Whether you are rebuilding a hydrostatic transmission, diagnosing a PTO clutch electrical fault, setting engine idle, or replacing a steering valve, the manual provides the procedures, specifications and test sequences you need.

File Details

• Manual type: Technical Manual (repair and diagnostics)
• Brand: John Deere
• Models covered: 316, 318, 420 Lawn and Garden Tractors
• Language: English
• Page count: 426
• File format: PDF
• Document number: TM1590
• Edition / date: 01MAY95

Chapters Covered

The manual is split into repair sections and diagnostic sections. Each group opens with the tools, other materials and service parts kits required for that job.

• Section 10 — General Information
• Section 20 — Engine Repair
• Section 40 — Electrical Repair
• Section 50 — Power Train Repair
• Section 60 — Steering and Brake Repair
• Section 70 — Hydraulic Repair
• Section 80 — Miscellaneous Repair
• Section 220 — Engine, Fuel and Air System Checkout and Diagnosis
• Section 240 — Electrical Checkout, Operation and Diagnosis
• Section 250 — Power Train Checkout, Operation and Diagnosis
• Section 260 — Steering and Brakes Checkout, Operation and Diagnosis
• Section 270 — Hydraulic System Checkout, Operation and Diagnosis
• Section 299 — Dealer Fabricated Tools

Section 10 — General Information

Covers safety, machine specifications, repair specifications (metric and inch torque charts, O-ring boss fitting service recommendations, flat-face O-ring seal fittings, and 37° flare / 30° cone seat connector torque tables), test and adjustment specifications, fuels and lubricants (engine oil, transmission and hydraulic oil, grease, mower deck gear case oil), and component serial number locations.

Sections 20 & 40 — Engine and Electrical Repair

Section 20 covers engine removal and installation for the B43E, B43G, B48G, P218G and P220G engines, including drive shaft disconnection, PTO belt removal, engine mount torque values (39 N·m / 29 lb-ft on the 316, 47 N·m / 34 lb-ft on the 318 and 420), and idle adjustment. Section 40 covers the front PTO clutch in detail: armature, rotor and field coil inspection, bearing replacement, field coil continuity testing, and armature-to-rotor clearance adjustment to 0.46 mm (0.018 in.).

Section 50 — Power Train Repair

The largest repair section. Covers the hydrostatic transmission thoroughly: charge pump removal and installation, disassembly and inspection of the charge pump, charge relief valve, implement relief valve, transmission cover, pump and motor cylinder blocks, swashplate, control shaft and bearings. Also covers transmission removal and installation, transmission control linkage inspection across five versions, the differential (one-speed and two-speed with differential lock), rear axles, and the drive shaft including U-joint disassembly and assembly.

Sections 60 & 70 — Steering, Brakes and Hydraulics

Section 60 covers the 316 steering gearbox with the JDG457 Steering Gear Service Set, and the 318/420 hydrostatic steering valve including the four-port and early/later five-port variations, metering assembly, rotor-to-stator clearance check, and steering cylinder replacement. It also covers brake drum, shoe, adjuster and park brake linkage across versions. Section 70 covers the hydraulic control valve for single-spool, two-spool and three-spool configurations, including seal kits and detent replacement.

Section 80 — Miscellaneous Repair

Covers front axle service, mower spindle and jack sheave repair, and mower gear case repair for 38-, 46-, 50-, 60-inch and 260 rotary decks.

Diagnostic Sections 220–270

The diagnostic half mirrors the repair sections. Section 220 covers engine, fuel and air system checkout: spark plug gap, slow and fast idle, dashpot-to-governor arm bracket clearance, fuel pump flow and pressure, crankcase vacuum, compression and oil pressure. Section 240 covers electrical system checkout with schematics, component tests and adjustments. Section 250 covers power train checkout, theory of operation and diagnosis. Section 260 covers steering and brake checkout and testing. Section 270 covers hydraulic system checkout, schematics, theory of operation and diagnosis.

Section 299 — Dealer Fabricated Tools

Includes shop-made tool instructions such as the DFMX1 Steering Valve Fixture and DFMX2 Alignment Shims.

What This Manual Does for You

The John Deere 316, 318 and 420 share a platform but differ in engines, steering systems, hydraulic systems and power train configurations. A single manual covering all three lets you work on any of them without hunting down separate documentation. The repair sections walk through disassembly, inspection and reassembly of every major component — the hydrostatic transmission, differential, steering gearbox or valve, front PTO clutch, hydraulic control valve, brakes and axles — with the torque values you need at each step. The diagnostic sections tell you how to test those systems, what readings are in spec, and what to do when they are not.

Torque values here are extensive and model-specific. Engine mounting cap screws are 39 N·m (29 lb-ft) on the 316 and 47 N·m (34 lb-ft) on the 318 and 420. Transmission-to-differential cap screws are 45 N·m (33 lb-ft). Axle housing-to-frame cap screws are 100 N·m (75 lb-ft). Brake drum-to-axle nuts are 88 N·m (65 lb-ft). Getting these right matters on a machine that gets worked hard. The same goes for clearances and adjustments: PTO clutch armature-to-rotor clearance at 0.46 mm (0.018 in.), brake rod spring length at 42 mm (1.650 in.), rotor-to-stator clearance at 0.08 mm (0.003 in.) maximum, and steering worm bearing preload at 0.60–1.0 N·m (5–8 lb-in.) rolling torque.

Because this is a technical manual written for technicians, it assumes you have the tools and experience to follow the procedures. It identifies special tools where required — the JDG457 steering service set, DFMX1 fixture, DFMX2 shims — and tells you where dealer-fabricated tools are used. The diagnostic sections are organized for quick access, with test specifications at the front of Section 10 Group 20 followed by dedicated checkout sections for each system.

Delivery is instant. Once payment clears, you get a PDF file you can open on any device, zoom into for detail, and print the pages you need for the job. No shipping, no waiting for a disc or binder. If you are maintaining a 316, 318 or 420, this manual is the reference that tells you what to do and what the numbers should be.

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